Saudi Arabia's religious police keep such a low profile during the haj, it's hard to imagine that you are in Islam's holiest city. The kingdom, where Islam first emerged around 1,400 years ago, applies a strict form of Sunni Islamic sharia law that imposes gender segregation, forces shops to close during prayer times and prohibits women from driving. But in Mecca, the enforcement of many of these rules is relaxed during the haj, a duty for every able-bodied Muslim. And with the government investing billion of dollars in recent years to make pilgrimage safer and more comfortable, many pilgrims end up going home as goodwill ambassadors for the country.